CN105330476A - Red mud-assisted soil remediation fertilizer - Google Patents

Abstract

The invention discloses red mud-assisted soil remediation fertilizer. The red mud-assisted soil remediation fertilizer is prepared from, by weight, 24-26 parts of wheat gluten flour, 8-10 parts of humus soil, 28-32 parts of cottonseed cakes, 68-74 parts of red mud, 2-3 parts of potassium selenite, 8-10 parts of humic acidic ammonium, 40-45 parts of kapok hulls, 13-15 parts of siderite slag, 13-15 parts of limonite slag, 40-45 parts of orange peel, 4-5 parts of an EM compound microorganism bacterium agent and an appropriate amount of water. According to the soil remediation fertilizer, the red mud materials are utilized to be combined with the humic raw materials, the content of soil nutrients, especially silicon, can be increased, the content of biological effective-state heavy metal is simultaneously decreased, the stabilization effect is improved, accumulation of the heavy metal in organisms is reduced, and the purpose of soil improvement is achieved to enable the soil to be beneficial for crop growth.

Description

A kind of red mud assisted soil repairing fertiliser

Technical field

The present invention relates to technical field of fertilizers, particularly relate to a kind of red mud assisted soil repairing fertiliser.

Background technology

Along with the fast development of economy and the progress of industrial technology, work, the detrimentally affect of agriculture production to environment are constantly aggravated, constantly stack to soil surface due to solid waste and topple over, harmful waste water constantly permeates in soil, obnoxious flavour in air and floating dust are also continuous to be dropped in soil with rainwater, result in soil pollution.Not only reduce the seed output and quality of farm crop, also the HUMAN HEALTH of indirect hazard.

And to the improvement of soil pollution mainly through engineering repairing method and phytoremediation, wherein engineering repairing method mainly comprises the method for improving the soil, electro reclamation, Soil leaching and heat treating process etc., engineering control measure is applicable to that contaminated area is little usually, severe pollutant and easily the soil effect of diffusion is comparatively obvious, fundamentally can improve soil at all, but treatment cost is high, and easily form secondary pollution, also possibility spoiled soil structure, easily causes soil fertility to decline.The usual cost of phytoremediation technology is low, soil organic matter content and soil fertility can be improved, but the patience of plant heavy metal pollutent is limited, be only applicable to the soil remediation of medium pollution degree, a kind of plant can only repair the soil of a certain heavy metal contamination usually simultaneously, and other heavy metals likely in activating soil, for various metals and organic combined pollution poor effect, super enriching plant poor growth, usual repairing efficiency is longer, is difficult to the requirement that satisfied quick rehabilitating soil pollutes.

Charcoal has good absorption property, stable chemical nature, can reduce the biological effectiveness of heavy metal in soil, can improve crop yield, and raw material is extensive, cost is low, makes it in pollution administration soil, have clear superiority and using value simultaneously.For this reason, current inventor provides a kind of take charcoal as the soil remediation fertilizer of immobilized matrix, and the reparation for soil pollution provides a kind of effective way.

Summary of the invention

The object of the invention is exactly the defect in order to make up prior art, provides a kind of red mud assisted soil repairing fertiliser.

The present invention is achieved by the following technical solutions:

A kind of red mud assisted soil repairing fertiliser, is made up of the raw material of following weight part: wheat gluten flour 24-26, vegetable mould 8-10, cottonseed cake 28-32, red mud 68-74, potassium selenite 2-3, ammonium humate 8-10, kapok shell 40-45, sparring slag 13-15, limonite slag 13-15, tangerine peel 40-45, EM complex micro organism fungicide 4-5, water are appropriate.

The concrete steps of the preparation of described soil remediation fertilizer are as follows:

(1) mix after tangerine peel, kapok shell dryness in the sun with sparring slag, be placed in airtight calcining furnace, 380-420 DEG C is warming up under nitrogen atmosphere with the speed of 15 DEG C/min, be incubated and add limonite slag after 20-30 minute, keep thermotonus 30-40 minute, then cool the temperature to 230-260 DEG C, constantly oxygen is passed in airtight calcining furnace, take out calcinate after 30 minutes, concussion is rocked after 10-15 minute and is crossed 20 mesh sieves, obtains magnetic bio carbon powder for subsequent use;

(2) wheat gluten flour, vegetable mould, cottonseed cake mixing are dropped in fermentation vat, add water and keep fermentation heap water content at 50-60%, ferment and take out fermentation materials after 22-25 days, and squeeze and filter, obtain fermentation solid residue and fermented liquid for subsequent use;

(3) by step 2 gained fermented liquid with potassium selenite, ammonium humate mixing post-heating to 60-70 DEG C, stir after 10-15 minute and add step 1 gained charcoal powder again, dipping 40-60 minute, during dipping, ultrasound wave irradiation is adopted to fermented liquid, ultrasonic frequency is 20-30kHz, and power is 65-75W, and the time is 90-120 minute, flood rear filtered through gauze, obtain dipping charcoal for subsequent use;

(4) red mud is placed in calcining furnace, at 600-700 DEG C, calcines cooling after 20-30 minute take out, cross 50 mesh sieves after pulverizing, obtain red mud particle for subsequent use;

(5) step 3 gained dipping charcoal is mixed with step 2 gained fermentation solid residue, step 4 gained red mud particle, EM complex micro organism fungicide and other leftover materials be placed on granulation in tablets press, for subsequent use;

(6) frequency of utilization is 30-40kHz, power be the ultrasonic wave of 10W to step 4 gained particle irradiation 40-60 minute, weigh after packaging, obtain soil remediation fertilizer of the present invention.

The using method of repairing fertiliser of the present invention is be manured into soil after mixing according to the part by weight of 20%-25% and common fertilizer.

Advantage of the present invention is:

The sparring slag of same part by weight and limonite slag and biomass mixed calcining is used in preparation process, can by the recycling between product, the charcoal of the high magnetic of more efficient acquisition, and significantly increase charcoal surfactivity whereby, improve adsorptivity, add the accumulation ability to soil objectionable constituent, coordinate organic and effect that is mineral filler to play the dual-use function of nutrient supply and soil remediation.

Air in charcoal inner pore can be discharged by the ultrasound wave irradiation in preparation process during dipping, improves the degree of uniformity that in fermented liquid, solute disperses in charcoal, shortens dipping time.

In preparation process, second time ultrasound wave irradiation can to increase after granulation microbic activity in fertiliser granulates, improves the removal effect of dehydrogenase activity and organic pollutant.

Soil remediation fertilizer of the present invention utilizes red mud material in conjunction with humic raw material, the content of soil nutrient especially silicon can be improved, reduce biologically effective state heavy metal content simultaneously, improve stabilization effect, reduce heavy metal accumulation in vivo, realize the object of soil improvement, make it be conducive to the growth of crop.

Embodiment

A kind of red mud assisted soil repairing fertiliser, is made up of the raw material of following weight part (kg): wheat gluten flour 24, vegetable mould 8, cottonseed cake 28, red mud 68, potassium selenite 2, ammonium humate 8, kapok shell 40, sparring slag 13, limonite slag 13, tangerine peel 40, EM complex micro organism fungicide 4, water are appropriate.

The concrete steps of the preparation of described soil remediation fertilizer are as follows:

(1) mix after tangerine peel, kapok shell dryness in the sun with sparring slag, be placed in airtight calcining furnace, 380 DEG C are warming up under nitrogen atmosphere with the speed of 15 DEG C/min, be incubated and add limonite slag after 20 minutes, keep thermotonus 30 minutes, then cool the temperature to 230 DEG C, constantly oxygen is passed in airtight calcining furnace, take out calcinate after 30 minutes, concussion is rocked after 10 minutes and is crossed 20 mesh sieves, obtains magnetic bio carbon powder for subsequent use;

(2) wheat gluten flour, vegetable mould, cottonseed cake mixing are dropped in fermentation vat, add water and keep fermentation heap water content 50%, ferment and take out fermentation materials after 22 days, and squeeze and filter, obtain fermentation solid residue and fermented liquid for subsequent use;

(3) by step 2 gained fermented liquid and potassium selenite, ammonium humate mixing post-heating to 60 DEG C, stir after 10 minutes and add step 1 gained charcoal powder again, flood 40 minutes, during dipping, ultrasound wave irradiation is adopted to fermented liquid, ultrasonic frequency is 20kHz, and power is 65W, and the time is 90 minutes, flood rear filtered through gauze, obtain dipping charcoal for subsequent use;

(4) red mud is placed in calcining furnace, at 600 DEG C, calcines cooling after 20 minutes take out, cross 50 mesh sieves after pulverizing, obtain red mud particle for subsequent use;

(5) step 3 gained dipping charcoal is mixed with step 2 gained fermentation solid residue, step 4 gained red mud particle, EM complex micro organism fungicide and other leftover materials be placed on granulation in tablets press, for subsequent use;

(6) frequency of utilization is 30kHz, power be the ultrasonic wave of 10W to step 4 gained particle irradiation 40 minutes, after weighing, packaging, obtains soil remediation fertilizer of the present invention.

In order to further illustrate using value of the present invention, contriver have chosen the rice test field of one piece of light contamination, wherein half only uses common fertilizer as a control group during rice cultivation, second half uses repairing fertiliser of the present invention and common fertilizer mixed planting as experimental group, to soil sampling analysis between planting season, as follows in conjunction with rice yield:

	Control group	Experimental group
			Soil available nitrogen content (mg/kg)	47.41	60.39
Soil available phosphorus content (mg/kg)	86.99	96.46
			Available potassium in soils content (mg/kg)	141.63	170.26
Soil CEC (cmol/kg)	10.58	12.15
			Rice yield (kg/ mu)	462	486

After can being found out employed soil remediation fertilizer of the present invention by above data, in soil, available nutrient content obviously increases, and soil fertility gets a promotion, the level of soil pollution simultaneously reduces, ion exchange capacity increases, and the final output improving crop, to soil, there is significant improved effect.

Claims (2)

1. a red mud assisted soil repairing fertiliser, it is characterized in that, be made up of the raw material of following weight part: wheat gluten flour 24-26, vegetable mould 8-10, cottonseed cake 28-32, red mud 68-74, potassium selenite 2-3, ammonium humate 8-10, kapok shell 40-45, sparring slag 13-15, limonite slag 13-15, tangerine peel 40-45, EM complex micro organism fungicide 4-5, water are appropriate.

2. red mud assisted soil repairing fertiliser according to claim 1, it is characterized in that, the concrete steps of preparation method are as follows:

(1) mix after tangerine peel, kapok shell dryness in the sun with sparring slag, be placed in airtight calcining furnace, 380-420 DEG C is warming up under nitrogen atmosphere with the speed of 15 DEG C/min, be incubated and add limonite slag after 20-30 minute, keep thermotonus 30-40 minute, then cool the temperature to 230-260 DEG C, constantly oxygen is passed in airtight calcining furnace, take out calcinate after 30 minutes, concussion is rocked after 10-15 minute and is crossed 20 mesh sieves, obtains magnetic bio carbon powder for subsequent use;

(2) wheat gluten flour, vegetable mould, cottonseed cake mixing are dropped in fermentation vat, add water and keep fermentation heap water content at 50-60%, ferment and take out fermentation materials after 22-25 days, and squeeze and filter, obtain fermentation solid residue and fermented liquid for subsequent use;

(3) by step 2 gained fermented liquid with potassium selenite, ammonium humate mixing post-heating to 60-70 DEG C, stir after 10-15 minute and add step 1 gained charcoal powder again, dipping 40-60 minute, during dipping, ultrasound wave irradiation is adopted to fermented liquid, ultrasonic frequency is 20-30kHz, and power is 65-75W, and the time is 90-120 minute, flood rear filtered through gauze, obtain dipping charcoal for subsequent use;

(4) red mud is placed in calcining furnace, at 600-700 DEG C, calcines cooling after 20-30 minute take out, cross 50 mesh sieves after pulverizing, obtain red mud particle for subsequent use;

(5) step 3 gained dipping charcoal is mixed with step 2 gained fermentation solid residue, step 4 gained red mud particle, EM complex micro organism fungicide and other leftover materials be placed on granulation in tablets press, for subsequent use;

(6) frequency of utilization is 30-40kHz, power be the ultrasonic wave of 10W to step 4 gained particle irradiation 40-60 minute, weigh after packaging, obtain soil remediation fertilizer of the present invention.